This is MUCH MORE than a protein shake! This is as close as you will ever get to having an all in one bariatric supplement! The Celebrate ENS shake is a one of a kind way to get your multivitamin, calcium, fiber AND protein all in one. Each ENS (Essential Nutrient System) shake contains a high potency multivitamin, 500 mg of calcium citrate, 4 g of fiber, and 25 g of whey isolate protein in each serving. This product is a great option for patients immediately following surgery.